Water-tight union for lead cables.



"PATENTED JUNE 16,1903. G. L. MARTIN.

WATER TIGHT UNION FOR LEAD GABLES.

APPLICATION FILED MAR. 4, 1903.

N0 MODEL.

Gemg Muffin Q mwmbo'a UNITED STATES Patented June 16, 1903.

GEORGE L. MARTIN, OF YORK, N. Y.

WATER-TIGHT UNION FOR LEAD CABLES.

SPECIFICATION forming part of Letters Patent No. 731,195, dated June 16,1903.

Application filed March 4, 1903.

To aZZ whom it may concern.-

Be it known that I, GEORGE L. MARTIN, a citizen of the United States,residing at New York, in the county and State of New York, have inventeda new and useful Water-Tight Union for Lead Cables, of which thefollowing is a specification.

This invention relates to electric-light fixtures; and the objectthereof is to provide a water-tight union for a lead cable with an out-' let-box that can be easily applied without dan-.

ger of injury to any of the threads.

I accomplish the object of my invention by the construction illustratedin the accompanying drawings, in which Figure 1 is a longitudinalsection of my improved union and a section ofa portion of anoutlet-box,showing my union connected therewith. Fig. 2 is a'side viewof the union, and Fig. 3 is an end view of the same.

In the accompanying drawings like numerals of reference refer to thesame partsin each of the views.

In practice I provide a short tubular piece 5, provided intermediate ofthe ends with an integral polygonal-edged collar 6 and with an exteriorthread 7 on one end and the other end being preferably larger andprovided with an exterior thread 8. A second tubular piece 9 is providedwith an annular collar 10 of approximately the same diameter as thelarger end of the piece 5. I also provide a hexagon nut or junction 11,having an inwardly-directed flange 12, leaving an aperture large enoughfor the tubular piece 9 to pass through, except the collar 10.

In operation the small end of the piece 5, with the thread 7, is screwedinto the outletbox 13, a lead washer 14 being interposed between the boxand the collar 6 to form a water-tight joint. Thejunction 11 is thenplaced over the piece 9, a gasket is placed against the collar 10, andthe junction is then screwed Serial No. 146,227. (No model.)

upon the thread 8 of the piece 5 until the gasket 14 is tightly wedgedbetween the collar 10 and the end of the piece 5, thereby forming awater-tight connection. The lead cable 15, containing the wires 16 and16, is passed into the piece 9, the wires having exposed ends andpassing on into the outlet-box, and the cable is sealed at its entranceto the piece 9 by lead or solder 18, forming a water-tight union withthe outlet-box.

In unions of this kind it has been the custom to use a threaded sleeveto enter the outlet-box and then screw the union upon this sleeve. Thedifficulty has been to turn this sleeve into the threaded opening in thebox without injuring the thread and when in to make tight enough jointto exclude the water. The object of this invention is to obviate thisdifliculty and at the same time to produce a union that shall not beexpensive to manufacture.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

A water-tight union for lead cable comprising a tubular piece havingexterior screwthreads at each endwith an intermediate unthreadedportion; a second tubular piece abutting against said first piece, saidpieces having substantially the same interior diameter throughout,thereby together forming a channel for the cable, said second piecehaving an annular collar; and aj unction having a flange engaging thecollar on said second piece and the adjacent screw-threaded end of saidfirst piece, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

- I GEORGE L. MARTIN.

Witnesses:

ANTHONY SCHLATTER, HARRY H. CASEY.

